321540425351 has 4 divisors (see below), whose sum is σ = 321841212600. Its totient is φ = 321239638104.

The previous prime is 321540425347. The next prime is 321540425399. The reversal of 321540425351 is 153524045123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 153524045123 = 127 ⋅1208850749.

It is a cyclic number.

It is not a de Polignac number, because 321540425351 - 2² = 321540425347 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321540425321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150392021 + ... + 150394158.

It is an arithmetic number, because the mean of its divisors is an integer number (80460303150).

Almost surely, 2^321540425351 is an apocalyptic number.

321540425351 is a deficient number, since it is larger than the sum of its proper divisors (300787249).

321540425351 is a wasteful number, since it uses less digits than its factorization.

321540425351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300787248.

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 321540425351 in words is "three hundred twenty-one billion, five hundred forty million, four hundred twenty-five thousand, three hundred fifty-one".